A basketball star covers 275 m horizontally in a jump to

Question

Find the solution of all parts of given problem:

Problem: A basketball star covers 2.75 m horizontally in a jump to dunk the ball. His motion through space can be modeled precisely as that of a particle at his center of mass. His center of mass is at elevation 1.02 m when he leaves the floor. It reaches a maximum height of 1.75 m above the floor and is at elevation 0.950 m when he touches down again.

Part A: Determine his time of flight (his "hang time")?

s

Part B: Determine his horizontal velocity at the instant of takeoff?

m/s

part C: Determine his vertical velocity at the instant of takeoff?

m/s

part D: Determine his takeoff angle?

° above the horizontal

I need help to determine his horizontal velocity at the instant of takeoff.